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EP3086154B1 - Linsenbewegungsvorrichtung und kameramodul und tragbares endgerät damit - Google Patents

Linsenbewegungsvorrichtung und kameramodul und tragbares endgerät damit Download PDF

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Publication number
EP3086154B1
EP3086154B1 EP16164859.7A EP16164859A EP3086154B1 EP 3086154 B1 EP3086154 B1 EP 3086154B1 EP 16164859 A EP16164859 A EP 16164859A EP 3086154 B1 EP3086154 B1 EP 3086154B1
Authority
EP
European Patent Office
Prior art keywords
coil
housing
bobbin
elastic member
circuit board
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP16164859.7A
Other languages
English (en)
French (fr)
Other versions
EP3086154A1 (de
Inventor
Sang Ok Park
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Innotek Co Ltd
Original Assignee
LG Innotek Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020150057836A external-priority patent/KR102536825B1/ko
Priority claimed from KR1020150090872A external-priority patent/KR102480961B1/ko
Application filed by LG Innotek Co Ltd filed Critical LG Innotek Co Ltd
Publication of EP3086154A1 publication Critical patent/EP3086154A1/de
Application granted granted Critical
Publication of EP3086154B1 publication Critical patent/EP3086154B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/08—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted to co-operate with a remote control mechanism
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/64—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
    • G02B27/646—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
    • G03B3/10—Power-operated focusing
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/51—Housings
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/54—Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/70—Circuitry for compensating brightness variation in the scene
    • H04N23/75—Circuitry for compensating brightness variation in the scene by influencing optical camera components
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B2205/0007—Movement of one or more optical elements for control of motion blur
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B2205/0053—Driving means for the movement of one or more optical element
    • G03B2205/0069—Driving means for the movement of one or more optical element using electromagnetic actuators, e.g. voice coils

Definitions

  • a voice coil motor may perform auto-focusing for controlling the distance between an image sensor and a lens so as to adjust the focal length of the lens.
  • the lens moving apparatus 100 includes a cover member 300, a bobbin 110, a first coil 120, a magnet 130, a housing 140, an upper elastic member 150, a lower elastic member 160, a second coil 170, a base 210 and a circuit board 250.
  • the cover member 300 defines an accommodation space along with the base 210 so as to accommodate different components 110, 120, 130, 140, 150, 160 and 250.
  • the cover member 300 may have a hole formed in the upper end thereof in order to expose a lens (not shown) coupled to the bobbin 110 to outside light.
  • the hole in the cover member 300 may further be provided with a window formed of a light-transmitting material, in order to prevent impurities, such as dust or moisture, from infiltrating into a camera module.
  • the cover member 300 may be made of a non-magnetic material such as SUS in order to prevent it from being attracted to the magnet 130, but may also be made of a magnetic material so as to serve as a yoke.
  • the bobbin 110 may have therein a bore for the mounting of the lens or the lens barrel.
  • the bore in the bobbin 110 may have a circular, elliptical, or polygonal section, which coincides with the shape of the lens or the lens barrel to be mounted, without being limited thereto.
  • the bobbin 110 may include an upper avoidance recess 112, which is formed in the region of the upper surface thereof that corresponds to a connection portion 153 of the upper elastic member 150.
  • the bobbin 110 may further include a lower avoidance recess (not shown), which is formed in a region of the lower surface thereof that corresponds to a connection portion 163 of the lower elastic member 150.
  • the connection portion 153 of the upper elastic member 150 and the bobbin 110 may be designed so as not to interfere with each other, and the upper avoidance recess and/or the lower avoidance recess of the bobbin 110 may not be formed.
  • the upper avoidance recess 112 and the lower avoidance recess (not shown) of the bobbin 110 when the bobbin 110 moves in the first direction, spatial interference between the connection portions 153 and 163 of the upper and lower elastic member 150 and 160 and the bobbin 110 may be prevented, and the connection portions 153 and 163 of the upper and lower elastic members 150 and 160 may be easily and elastically deformed.
  • the first coil 120 is disposed on the outer circumferential surface of the bobbin 110 so as to electromagnetically interact with the magnet 130 disposed on the housing 140.
  • a driving signal may be applied to the first coil 120.
  • FIG. 3 is a schematic exploded perspective view illustrating the housing 140, the magnet 130 and the circuit board 250, which are shown in FIG. 1 .
  • FIG. 4 is an assembled perspective view illustrating the housing 140, the magnet 130 and the circuit board 250, which are shown in FIG. 3 .
  • the housing 140 supports the magnet 130 and the circuit board 250, and accommodates the bobbin 110 therein so as to allow the bobbin 110 to move in the first direction, which is parallel to the optical axis.
  • the housing 140 may be configured to have a hollow column shape overall.
  • the housing 140 may include four side walls 140a to 140d, and may have a polygonal (e.g., a square or octagonal) or circular bore.
  • the side walls 140a to 140d of the housing 140 may include magnet holes 141a, 141a', 141b and 141b', in which magnets 130 are mounted, disposed or secured.
  • magnet holes 141a, 141a', 141b and 141b' are shown in FIG. 3 as having the form of a through-hole, the magnet hole may alternatively take the form of a recess, without being limited thereto.
  • the first stopper 143 of the housing 140 which is intended to prevent the cover member 300 from colliding with the housing 140, may prevent the upper surface of the housing 140 from directly colliding with the inner surface of the upper portion of the cover member 300 upon the application of external impact.
  • the housing 140 may be provided on the upper surface thereof with a plurality of upper frame support protrusions 144 to which an outer frame 152 of the upper elastic member 150 is coupled.
  • the housing 140 may be provided on the lower surface thereof with a plurality of lower frame support protrusions 147 to which an outer frame 162 of the lower elastic member 160 is coupled.
  • the housing 140 may be provided in the corners thereof with lower guide recesses 148, to which guide members 216 of the base 210 are fitted, fastened or coupled.
  • the magnet 130 may be disposed inside or outside the side walls 140a to 140d of the housing 140 without forming the magnet holes in the side walls 140a to 140d of the housing 140.
  • the magnet 130 may be configured to have a shape corresponding to the side walls 140a to 140d of the housing 140, for example, a rectangular shape, without being limited thereto.
  • FIG. 5 is a plan view illustrating the upper elastic member 150 shown in FIG. 1 .
  • FIG. 6 is a plan view illustrating the lower elastic member 160 shown in FIG. 1 .
  • At least one of the upper elastic member 150 and the lower elastic member 160 may be divided into two segments.
  • the upper elastic member 150 may include first and second upper elastic members 150a and 150b, which are conductively separated from each other
  • the lower elastic member 160 may include first and second lower elastic members 160a and 160b, which are conductively separated from each other.
  • each of the upper elastic member 150 and the lower elastic member 160 may be embodied as a leaf spring, they may also be embodied as a coil spring, a suspension wire or the like, without being limited thereto.
  • Each of the first and second upper elastic members 150a and 150b may include an inner frame 151 coupled to the upper support protrusion 113 of the bobbin 110, an outer frame 152 coupled to the upper frame support protrusion 144 of the housing 140, and a first connection portion 153 connecting the inner frame 151 and the outer frame 152 to each other.
  • Each of the first and second lower elastic members 160a and 160b may include an inner frame 161 coupled to the lower support protrusion of the bobbin 110, an outer frame 162 coupled to the lower frame support protrusion 147 of the housing 140, and a second connection portion 163 connecting the inner frame 161 and the outer frame 162 to each other.
  • connection portions 153 and 163 of the upper and lower elastic members 150 and 160 may be bent or curved at least once so as to form a predetermined pattern.
  • the upward and/or downward movement in the first direction of the bobbin 110 may be elastically (flexibly) supported by positional change or fine deformation of the connection portions 153 and 163.
  • One end of the first coil 120 (for example, the starting end of the first coil 120) may be conductively connected to the first inner connector R1 of the first upper elastic member 150a, and the other end of the first coil 120 (for example, the terminating end of the first coil 120) may be conductively connected to the second inner connector R2 of the second upper elastic member 150b.
  • a first terminal 251-1 of the circuit board 250 may be conductively connected to the first outer connector Q1, and a second terminal 251-2 of the circuit board 250 may be conductively connected to the second outer connector Q2.
  • the inner frame 161 of the first lower elastic member 160a may include a third inner connector R3, and the inner frame 161 of the second upper elastic member 160b may include a fourth inner connector R4.
  • One end of the second coil 170 (for example, the starting end of the second coil 170) may be conductively connected to the third inner connector R3, and the other end of the second coil 170 (for example, the terminating end of the second coil 170) may be conductively connected to the fourth inner connector R4.
  • a third terminal 251-3 of the circuit board 250 may be conductively connected to the third outer connector Q3, and a fourth terminal 251-4 of the circuit board 250 may be conductively connected to the fourth outer connector Q4.
  • Bonding between the first coil 120 and the first and second inner connectors R1 and R2, bonding between the circuit board 250 and the first and second outer connectors Q1 and Q2, bonding between the second coil 170 and the third and fourth inner connectors R3 and R4, and bonding between the circuit board 250 and the third and fourth outer connectors Q3 and Q4 may be implemented using thermal fusion, soldering or conductive epoxy (for example, Ag epoxy).
  • first and second inner connectors R1 and R2 and the first and second outer connectors Q1 and Q2 may be positioned at the inner frames and the outer frames of the first and second upper elastic members 150a and 150b, which are positioned adjacent to the circuit board 250.
  • the first inner connector R1 may be positioned at one end of the inner frame 151 of the first upper elastic member 150a
  • the second inner connector R2 may be positioned at one end of the inner frame 151 of the second upper elastic member 150b.
  • the distance between one end of the inner frame of the first upper elastic member 150a and one end of the inner frame of the second upper elastic member 150b may be shorter than the distance between the one end of the inner frame of the first upper elastic member 150a and the other end of the inner frame of the second upper elastic member 150b.
  • the first outer connector Q1 may be positioned at one end of the outer frame 152 of the first upper elastic member 150a
  • the second outer connector Q2 may be positioned at one end of the outer frame 152 of the second upper elastic member 150b.
  • the distance between the one end of the outer frame of the first upper elastic member 150a and the one end of the outer frame of the second upper elastic member 150b may be shorter than the distance between the one end of the outer frame of the first upper elastic member 150a and the other end of the outer frame of the second upper elastic member 150b.
  • each of the first and second lower elastic members 160a and 160b may have therein a third through hole 161a or recess, which is formed in the inner frame 161 and is coupled to the lower support protrusion of the bobbin 110, and a fourth through hole 162a or recess, which is formed in the outer frame 162 and is coupled to the lower frame support protrusion of the housing 140.
  • Bonding between the upper and lower elastic members 150 and 160 and the bobbin 110 and bonding between the upper and lower elastic members 150 and 160 and the housing 140 may be implemented using, for example, thermal fusion and/or adhesive.
  • the circuit board 250 may be disposed at, coupled to or mounted on the housing 140, and may be conductively connected to at least one of the upper and lower elastic members 150 and 160.
  • the circuit board 250 may be a printed circuit board, for example, an FPCB, a PCB or a ceramic board.
  • the circuit board 250 may be secured to, supported by or disposed on one of four side walls 140a to 140d (for example, 140c) of the housing 140 without being limited thereto. In another embodiment, the circuit board 250 may be supported by the upper surface of the housing 140.
  • the circuit board 250 may receive a voltage, which is induced to the second coil 170 by electromotive force resulting from inductive interaction between the first coil 120 and the second coil 170.
  • the circuit board 250 may include two terminals 251-1 and 251-2 for supplying a first voltage (for example, + voltage) and a second voltage (for example, voltage) to the first coil 120, and two terminals 251-3 and 251-4 for receiving the voltage induced from the second coil 170.
  • a first voltage for example, + voltage
  • a second voltage for example, voltage
  • the first inner connector R1 of the first upper elastic member 150a may constitute a conductive connection 256a along with an end of the first coil 120, and the first outer connector Q1 of the first upper elastic member 150a may constitute a conductive connection 258a along with the circuit board 250.
  • the second inner connector R2 of the second upper elastic member 150b may constitute a conductive connection 256b to the other end of the first coil 120, and the second outer connector Q2 of the second upper elastic member 150b may constitute a conductive connection 258b to the circuit board 250.
  • FIG. 7B illustrates the conductive connection between the lower elastic member 160 and the second coil 170, shown in FIG. 1 .
  • the third inner connector R3 of the first lower elastic member 160a may constitute a conductive connection (not shown) to one end of the second coil 170, and the third outer connector Q3 of the first lower elastic member 160a may constitute a conductive connection (not shown) to the circuit board 250.
  • the fourth inner connector R4 of the second lower elastic member 160b may constitute a conductive connection 257b to the other end of the second coil 170, and the fourth outer connector Q4 of the second lower elastic member 160b may constitute a conductive connection to the circuit board 250.
  • the first voltage (for example, + voltage) and the second voltage (for example, - voltage), which are supplied to the circuit board 250, may be applied to the first coil 120 through the conductive connections 256a and 256b, 258a and 258b.
  • the voltage induced to the second coil 170 may be supplied to the circuit board 250 through the conductive connections between the second coil 170 and the first and second lower elastic members 160a and 160b and the conductive connections between the first and second lower elastic members 160a and 160b and the circuit board 250.
  • the base 210 may be coupled to the cover member 300 so as to define a space for accommodating the bobbin 110 and the housing 140 therein.
  • the base 210 may have a bore, which corresponds to the bore of the bobbin 110 and/or the bore of the housing 140, and may be configured to have a shape, for example, a rectangular shape, which coincides with or corresponds to the cover member 300.
  • the second coil 170 may be wound clockwise or counterclockwise about the optical axis without being limited thereto.
  • the second coil 170 may correspond to the first coil 120 or may be aligned with the first coil 120 without being limited thereto.
  • the second coil 170 is shown in FIG. 1 as having a ring shape, the disclosure is not limited thereto.
  • the second coil 170 may be embodied to take the form of a PCB or an FP coil.
  • the first coil 120 may be moved in the first direction along with the bobbin 110 by an electromagnetic force resulting from the electromagnetic interaction between the current flowing through the first coil 120 and the magnet 130.
  • displacement of the first coil 120 may be detected, and the driving signal supplied to the first coil 120 may be controlled.
  • FIG. 8 illustrates the second coil 170 and the blocking member 180, which are mounted on the base 210.
  • the blocking member 180 may be disposed in the groove 212 in the base 210, and the second coil 170 may be placed on the blocking member 180 fitted in the groove 212 in the base 210.
  • the blocking member 180 may be disposed between the base 210 and the second coil 170.
  • the blocking member 180 may be made of metal containing a Fe component.
  • FIG. 9 illustrates the disposition of a second coil 170a according to another embodiment.
  • the second coil 170a may be disposed on the housing 140, unlike the configuration shown in FIG. 8 .
  • the second coil 170a may be disposed on the upper end of the housing 140 so as to be spaced apart from the upper elastic member 150.
  • the second coil 170a which is disposed on the upper end of the housing 140, may be positioned above the first coil 120 but under the upper elastic member 150.
  • FIG. 9 illustrates the second coil 170a, which is disposed on the inner surfaces of the side walls 140a to 140d of the housing 140, the disclosure is not limited thereto.
  • the second coil 170 is disposed on the upper surface or the side walls 140a to 140d of the housing 140, the second coil 170 may be disposed at higher level than the first coil 120, which is mounted on the outer circumferential surface of the bobbin 110.
  • the second coil 170 is disposed on the upper surface of the housing 140 or the upper ends of the side walls 140a to 140d, it is possible to increase the distance between the second coil 170 and the image sensor of the camera module compared to the embodiment shown in FIG. 8 .
  • the blocking member 180 shown in FIG. 8 may be omitted in the case where the second coil 170 is disposed on the upper surface of the housing 140 or the upper end of the side walls 140a to 140d.
  • the second coil 170 may overlap the first coil 120 in the first direction.
  • the distance between the vertical line and the first coil 120 may be the same as the distance between the vertical line and the second coil 170.
  • the vertical line may be a line that is parallel to the optical axis or is parallel to the first direction, which is parallel to the optical axis and which extends through the center of the second coil 170, the center of the bobbin 110 and/or the center of the housing 140.
  • the distance between the vertical line and the first coil 120 may be longer than the distance between the vertical line and the second coil 170.
  • the distance between the vertical line and the first coil 120 may be shorter than the distance between the vertical line and the second coil 170.
  • FIG. 10 illustrates the conductive connection between the second coil 170a and the first and second upper elastic members 150a and 150b, shown in FIG. 9 .
  • one end of the second coil 170a (for example, the starting end of the second coil 170a) may be conductively connected to the first inner connector R1 of the first upper elastic member 150a.
  • the other end of the second coil 170a (for example, the terminating end of the second coil 170a) may be conductively connected to the second inner connector R2 of the second upper elastic member 150b.
  • a conductive connection 256a' may be formed between the first inner connector R1 and the one end of the second coil 170a, and a conductive connection 256b' may be formed between the second inner connector R2 and the other end of the second coil 170a.
  • the conductive connection between the circuit board 250 and the first and second outer connectors Q1 and Q2 of the first and second upper elastic members 150a and 150b may be implemented in the same manner as the embodiment illustrated in FIG. 7A .
  • the conductive connection between the circuit board 250 and the third and fourth outer connectors Q3 and Q4 of the first and second lower elastic members 160a and 160b may be implemented in the same manner as the embodiment illustrated in FIG. 7B .
  • the lens moving apparatus may include the components shown in FIG. 1 but may not include the circuit board 250.
  • the upper elastic member 150 may not be divided, and only the lower elastic member 160 may be divided into two segments.
  • the base 210 may be provided with four terminal pins. Among the four terminal pins, two terminal pins may be conductively connected to the outer frames of the lower elastic members 160a and 160b, and the first coil 120 may be conductively connected to the inner frames of the lower elastic members 160a and 160b.
  • the remaining two terminal pins may be conductively connected to two ends of the second coil 170. Consequently, driving power may be supplied to the first coil 120 through two of the four terminal pins provided at the base 210 and through the lower elastic members 160a and 160b, and the voltage applied to the second coil 170 may be output through the remaining two of the four terminal pins.
  • all the four terminal pins may be disposed on one side of the upper surface of the base 210 or on one side surface of the base 210.
  • the two terminal pins connected to the lower elastic members 160a and 160b may be disposed on a first side of the upper surface of the base 210 or a first side surface of the base 210
  • the two terminal pins connected to the second coil 170 may be disposed on a second side of the upper surface of the base 210 or a second side surface of the base 210.
  • the first and second sides of the upper surface of the base 210 may be opposite to each other or perpendicular to each other.
  • the first and second side surfaces of the base 210 may be opposite to each other or perpendicular to each other.
  • the lens moving apparatus may include the components shown in FIG. 1 but may not include the circuit board 250.
  • the upper elastic member 150 may not be divided, and only the lower elastic member 160 may be divided into two segments.
  • the base 210 may be provided with two terminal pins.
  • the two terminal pins may be conductively connected to two ends of the second coil 170.
  • the first coil 120 may be conductively connected to the inner frames of the lower elastic members 160a and 160b.
  • the outer frame of each of the lower elastic members 160a and 160b may partially extend, and may have a bent portion functioning as a terminal pin.
  • the lens moving apparatus 1100 includes a cover member 1300, an upper elastic member 1150, a bobbin 1110, a first coil 1120, a housing 1140, a magnet 1130, a lower elastic member 1160, elastic support members 1220a to 1220d, a second coil 1170, a third coil 1230, a circuit board 1250, a base 1210 and first and second position sensors 240a and 240b.
  • cover member 1300 shown in FIG. 1 may be equally applied to the cover member 1300.
  • the bobbin 1110 may include a bore for mounting a lens or a lens barrel, an upper support protrusion 1113 for enabling the bobbin 1110 to be coupled to the upper elastic member 1150, and a lower support protrusion 1114 for enabling the bobbin 1110 to be coupled to the lower elastic member 1160.
  • the bobbin 1110 may further include an upper avoidance recess 1112 for avoiding spatial interference with a connection portion 1153 of the upper elastic member 1150, and a lower avoidance recess 1119 for avoiding spatial interference with a connection portion 1163 of the lower elastic member 1160.
  • the bobbin 1110 has a shape that is different from that of the bobbin 110 shown in FIG. 1 , the bobbin 1110 may fulfill the same function as the bobbin 110, and the description regarding the bobbin 110 may thus be equally applied to the bobbin 1110.
  • the first coil 1120 is disposed on the outer circumferential surface of the bobbin 1110.
  • a driving signal may be applied to the first coil 1120.
  • the description regarding the first coil 1120 shown in FIG. 1 may be equally applied to the first coil 1120.
  • the housing 1140 may support the magnet 1130, and may accommodate the bobbin 1110 therein in a manner of allowing the bobbin 1110 to be moved in the first direction.
  • the housing 1140 may include an upper end portion 1710 having a bore therein, and a plurality of support portions 1720-1 to 1720-4 connected to the lower surface of the upper end portion 1710.
  • the support portions 1720-1 to 1720-4 of the housing 1140 may be disposed to correspond to the avoidance recesses 1112 and 11118 of the bobbin 1110. In another example, the support portions 1720-1 to 1720-4 of the housing 1140 may be disposed to respectively correspond to or to be respectively aligned with four corners of the upper end portion 1710.
  • the housing 1140 may be provided with at least one second stopper 1146, which protrudes from a side surface of the upper end portion 1710.
  • the housing may include at least one upper frame support protrusion 1144, which protrudes from the upper end portion 1710 for coupling to the outer frame 1152 of the upper elastic member 1150, and at least one lower frame support protrusion 1145, which protrudes from the lower surfaces of the support portions 1720-1 to 1720-4 for coupling to the outer frame 1162 of the lower elastic member 1160.
  • the upper end portion 1710 of the housing 1140 may include a second coil support portion 1741, which projects into the bore 1201 and is positioned to be lower than the upper surface by a height difference d1.
  • the second coil 1170 may be disposed or mounted on the second coil support portion 1741.
  • the upper surface 1740 of the upper end portion 1710 of the housing 1140 may include the second coil support portion 1741 and an outer support portion 1742, and a height difference d1 in the first direction may be present between the second coil support portion 1741 and the outer support portion 1742.
  • the second coil support portion 1741 may have the form of a recess or cavity, which is recessed from the outer support portion 1742, and may be configured to have a height difference d1 in the first direction with respect to the outer support portion 1742.
  • the second coil 1170 may be placed on the upper surface of the housing 1400.
  • the second coil 1170 may be disposed, seated or mounted on the second coil support portion 1741 of the upper end portion 1710 of the housing 1140.
  • the second coil 1170 may fulfill the same function as the second coil 170 shown in FIG. 1 , and the description regarding the second coil 170 shown in FIG. 1 may be equally applied to the second coil 1170.
  • the second coil 1170 may overlap the first coil 1120 in the first direction.
  • the distance between the vertical line and the first coil 1120 may be the same as the distance between the vertical line and the second coil 1170.
  • the vertical line may be a line that is parallel to the optical axis or is parallel to the first direction, which is parallel to the optical axis, and may extend through the center of the second coil 1170, the center of the bobbin 1110 and/or the center of the housing 1140.
  • the distance between the vertical line and the first coil 1120 may be shorter than the distance between the vertical line and the second coil 1170.
  • the magnet 1130 may be disposed on the outer circumferential surface of the housing 1140 so as to correspond to or to be aligned with the first coil 1120.
  • the magnet 1130 may be disposed on the support portions 1720-1 to 1720-4 of the housing 1140 using adhesive or double-sided adhesive tape.
  • the magnet 1130 may fulfill the same function as the magnet 130 shown in FIG. 1 , and the description regarding the magnet 130 shown in FIG. 1 may be equally applied to the magnet 1130.
  • each of the upper elastic member 1150 and the lower elastic member 1160 may be divided into two or more segments.
  • the upper elastic member 1150 may include first and second upper elastic members 1150a and 1150b, which are conductively separated from each other, and the lower elastic member 1160 may include first and second lower elastic members 1160a and 1160b.
  • Each of the first and second upper elastic members 1150a and 1150b and each of the first and second lower elastic members 1160a and 1160b may include inner frames 1151 and 1161 coupled to the bobbin 1110, outer frames 1152 and 1162 coupled to the housing 1140, and connection portions 1153 and 1163 connecting the inner frames 1151 and 1161 to the outer frames 1152 and 1162.
  • the inner frame 1151 of the upper elastic member 1150 may be provided with a bent portion 1151a, which is fitted over the upper support protrusion 1113 of the bobbin 1110.
  • the inner frame 1161 of the lower elastic member 1160 may be provided with a third through hole 1161a, which is coupled to the lower support protrusion of the bobbin 1110.
  • the outer frame 1162 of the lower elastic member 1160 may be provided with an insertion cutout 1162a, which is coupled to the lower frame support protrusion 1145 of the housing 1140.
  • the upper elastic member 1150 may be conductively connected to the second coil 1170.
  • the inner frame 1151 of the first upper elastic member 1150a may include a first inner connector S1
  • the inner frame 1151 of the second upper elastic member 1150b may include a second inner connector S2.
  • One end of the second coil 1170 may be conductively connected to the first inner connector S1 of the first upper elastic member 1150a, and the other end of the second coil 1170 may be conductively connected to the second inner connector S2 of the second upper elastic member 1150b.
  • the upper elastic member 1150 may be conductively connected to the circuit board 1250 via the elastic support portions 1220a to 1220d.
  • One end of at least one of the elastic support members 1220a to 1220d may be conductively connected to the outer frame 1152 of the first upper elastic member 1150a, and the other end of the at least one of the elastic support members 1220a to 1220d may be conductively connected to a corresponding one of the terminals provided on the terminal surface 1250a of the circuit board 1250.
  • One end of at least another one of the elastic support members 1220a to 1220d may be conductively connected to the outer frame 1152 of the second upper elastic member 1150b, and the other end of the at least another one thereof may be conductively connected to a corresponding one of the terminals provided on the terminal surface 1250a of the circuit board 1250.
  • the lower elastic member 1160 may be conductively connected to the first coil 1120.
  • One end of the first coil 1120 (for example, the starting end of the first coil 1120) may be conductively connected to the first lower elastic member 1160a through soldering or thermal fusion, and the other end of the first coil 1120 (for example, the terminating end of the first coil 1120) may be conductively connected to the second lower elastic member 1160b through soldering or thermal fusion.
  • the inner frame 1161 of the first lower elastic member 1160a may include a third inner connector S3, and the inner frame 1161 of the second lower elastic member 1160b may include a fourth inner connector S4.
  • the lower elastic member 1160 may be conductively connected to the circuit board 1250.
  • the outer frames 1162 of the first and second lower elastic members 1160a and 1160b may include pad portions 1165a and 1165b.
  • Each of the pad portions 1165a and 1165b of the first and second lower elastic members 1160a and 1160b may be conductively connected to a corresponding one of the terminals provided on the terminal surface 1250a of the circuit board 1250.
  • a voltage, which is induced to the second coil 1170, may be supplied to the circuit board 1250 through the first and second upper elastic members 1150a and 1150b and two selected from among the elastic support members 220 to 220d.
  • the lower elastic member 1160 may not be divided, but the upper elastic member 1150 may be divided into four segments. Accordingly, a driving signal may be supplied to the first coil 1120 from the circuit board 1250 through two selected from among the four divided upper elastic members and two selected from among the elastic support members 220a to 220d. A voltage, which is induced to the second coil 1170, may be supplied to the circuit board 1250 through the remaining two of the four divided upper elastic members and the remaining two of the elastic support members 220a to 220d.
  • FIG. 19 is an exploded perspective view illustrating the base 1210, the circuit board 1250, the third coil 1230 and the first and second position sensors 1240a and 1240b, which are shown in FIG. 11 .
  • the base 1210 may include a mounting groove 1213, which is recessed from the upper surface of the base 1210 and to which the lower frame support protrusions 1145 of the support portions 1720-1 to 1720-4 of the housing 1140 are fitted or secured.
  • the base 1210 may include a terminal surface support recess 1210a, which is recessed inward from the side surface thereof by a predetermined depth and has a shape corresponding to the terminal surface 1250a of the circuit board 1250, so as to support the terminal surface 1250a of the circuit board 1250.
  • the base 1210 may include a first position sensor mounting recess 1215a, which is recessed from the upper surface thereof and in which the position sensor 1240a is disposed, and a second position sensor mounting recess 1215b, which is recessed from the upper surface thereof and in which the second position sensor 1240b is disposed.
  • a first position sensor mounting recess 1215a which is recessed from the upper surface thereof and in which the position sensor 1240a is disposed
  • a second position sensor mounting recess 1215b which is recessed from the upper surface thereof and in which the second position sensor 1240b is disposed.
  • an angle defined between the imaginary lines, which are connected from the centers of the first and second position sensor mounting recesses 1215a and 1215b to the center of the base 1210 may be an angle of 90° .
  • the base 1210 may include a flange 1210b protruding from a lower portion of the outer circumferential surface thereof.
  • the base 1210 may include a coupling protrusion 1212a, which protrudes from the upper surface of the base 1210 so as to secure the circuit board 1250.
  • the first and second position sensors 1240a and 1240b may be disposed in the position sensor mounting recesses 1215a and 1215b of the base 1210, which is positioned under the circuit board 1250.
  • the first and second position sensors 1240a and 1240b may detect variation in magnetic force generated from the magnet 1130.
  • the first and second position sensors 1240a and 1240b may be embodied as a Hall sensor alone or as a driver including a Hall sensor.
  • the first and second position sensors 1240a and 1240b may be conductively connected to the circuit board 1250 through soldering, thermal fusion or the like.
  • the third coil 1230 may be disposed on the upper surface of the circuit board 1250, and the position sensors 1240a and 1240b may be disposed on the lower surface of the circuit board 1250.
  • the circuit board 1250 may include at least one terminal surface 1250a, which is bent from the upper surface thereof and which includes a plurality of terminals or pins for receiving electrical signals from the outside or supplying electrical signals to the outside.
  • the circuit board 1250 may have a fifth through hole 1251, which is coupled to the coupling protrusion 1212a of the base 1210. Furthermore, the circuit board 1250 may include pads 1252a to 1252d to which the other ends of the elastic support members 1120a to 1220d are connected. The pads 1252a to 1252d may be conductively connected to the plurality of terminals provided on the terminal surfaces 1250a via a wiring pattern formed on the circuit board 1250.
  • the circuit board 1250 may be a flexible printed circuit board (FPCB), without being limited thereto.
  • the terminals of the circuit board 1250 may also be formed on a surface of a PCB or the base 1210 in a manner of forming a surface electrode.
  • the circuit board 1250 may include at least one terminal or pad 1253, to which the starting or terminating end of the third coil 1230 is conductively connected.
  • the circuit board 1250 may include first terminals, to which the starting ends of second-direction third coils 1230a and 1230b are conductively connected, second terminals, to which the terminating ends of second-direction third coils 1230a and 1230b are conductively connected, third terminals, to which the starting ends of third-direction third coils 1230c and 1230d are conductively connected, and fourth terminals, to which the terminating ends of third-direction third coils 1230c and 1230d are conductively connected.
  • the third coil 1230 is disposed on the upper surface of the circuit board 1250 so as to correspond to or to be aligned with the magnet 130.
  • the number of third coils 1230 may be one or more, and may be the same as the number of magnets 1130, without being limited thereto.
  • FIG. 19 illustrates four third coils 1230a to 1230d, which are disposed on the upper surface of the circuit board 1250 so as to be spaced apart from each other, the disclosure is not limited thereto.
  • the third coil may be embodied as a coil formed on an additional circuit board, rather than on the circuit board 1250.
  • one end of each of two selected from among the elastic support members 1220a to 1220d may be conductively connected to the outer frame of a corresponding one of the first and second upper elastic members 1150a and 1150b.
  • the sensor 820 may be a device for detecting the movement of the camera module 200.
  • the sensor 820 may be a motion sensor, a dual-axis or triple-axis gyro sensor, an angular speed sensor, an acceleration sensor or a gravity sensor.
  • a female threaded portion may be formed on the inner circumferential surface of the bobbin 11000, and a male threaded portion may be formed on the outer circumferential surface of the lens barrel so as to correspond to the female threaded portion.
  • the lens barrel may be coupled to the bobbin 11000 by virtue of the threaded engagement therebetween.
  • the bobbin 11000 may move upward from the initial position thereof when forward current is applied, and the bobbin 11000 may move downward from the initial position thereof when reverse current is applied.
  • the distance by which the bobbin 11000 moves in one direction may be increased or reduced by adjusting the quantity of current in one direction.
  • the upper elastic member 15000 may include a plurality of upper elastic member segments, which are separated from each other. By virtue of this multisegmented configuration, the respective segments of the upper elastic member 15000 may receive current of different polarities or different powers.
  • the lower elastic member 16000 may also be divided into a plurality of lower elastic member segments, and may be conductively connected to the upper elastic member 15000.
  • the surface of the base 21000 that faces the portion of the circuit board 25000 on which the terminal surface 25300 is provided may be provided with a support recess, which is sized to correspond to the terminal surface 25300.
  • the support recess may be indented to a given depth from the outer circumferential surface of the base 21000, so as to prevent the portion provided with the terminal surface 25300 from protruding outward, or to adjust the distance by which the portion provided with the terminal surface 25300 protrudes.
  • FIG. 23 illustrates a linear support member 22000 according to one embodiment
  • the disclosure is not limited thereto. That is, the support member 22000 may take the form of a plate member or the like.
  • the second coil 23000 may perform handshake correction by moving the housing 14000 in the second direction and/or the third direction via electromagnetic interaction with the magnet 13000.
  • the housing 14000 may move parallel to the x-axis and the y-axis in terms of driving, the housing 14000 may also move slightly obliquely relative to the x-axis and the y-axis when moved while being supported by the support member 22000. Accordingly, it is necessary to install the magnet 13000 at a position corresponding to the second coil 23000.
  • the circuit member 23100 including the second coil 23000 may be installed or disposed on the upper surface of the circuit board 25000, which is disposed above the base 21000.
  • the disclosure is not limited thereto, and the second coil 23000 may come into close contact with the base 21000, or may be spaced apart from the base 21000 by a predetermined distance.
  • the second coil 23000 may be formed on a separate board, and in turn the board may be stacked on and connected to the circuit board 25000.
  • the circuit board 25000 may have a plurality of terminals 25100, which are disposed or formed thereon.
  • the terminals 25100 may be disposed on a bent terminal surface 25300.
  • the plurality of terminals 25100 may be disposed on the terminal surface 25300, and may receive external power so as to supply current to the first coil 12000 and/or the second coil 23000.
  • the number of terminals formed on the terminal surface 25300 may be increased or reduced in accordance with the kind of components, which are required to be controlled.
  • the circuit board 25000 may have one terminal surface 25300, or may have two or more terminal surfaces 25300.
  • the cover member 30000 may protect, for example, the movable unit, the second coil 23000, and the circuit board 25000 accommodated therein so as to prevent the components from being damaged.
  • the cover member 1300 may restrict the range of motion of the movable unit accommodated therein.
  • FIG. 24 is an exploded perspective view illustrating the base 21000, the circuit board 25000 and the second coil 23000 according to the embodiment.
  • the lens moving apparatus may further include a second sensor 24000.
  • the second sensor 24000 is disposed at the center of the second coil 23000 so as to detect movement of the housing 14000.
  • the second sensor 24000 may detect movement in the second and/or third direction of the housing 14000.
  • the second sensor 24000 may be embodied as a Hall sensor or the like, and may be embodied as any sensor as long as the sensor is able to detect variation in magnetic force. As illustrated in FIG. 24 , the second sensor 24000 may include a total of two second sensors, which are installed at side portions of the base 21000, which is disposed under the circuit board 25000, and the second sensors 24000 may be fitted into second sensor mounting grooves 21500 formed in the base 21000.
  • the lower surface of the circuit board 25000 may be the surface opposite to the surface on which the second coil 23000 is disposed.
  • the second sensor 24000 may be disposed under the second coil 23000 so as to be spaced apart from the second coil 23000 with the circuit board 25000 interposed therebetween. Specifically, the second coil 23000 may be disposed on the circuit board 25000, and the second sensor 24000 may be disposed on the lower surface of the circuit board 25000, without the second sensor 24000 being directly connected to the second coil 23000.
  • the lens moving apparatus may include the third coil 26000.
  • the third coil 26000 may function to detect displacement of the bobbin 11000 when the bobbin 11000 moves in the first direction for auto-focusing.
  • the third coil 26000 may be provided outside the housing 14000. As the bobbin 11000 moves in the first direction, the third coil 26000 may generate electromotive force resulting from the inductive interaction between the third coil 26000 and the first coil 12000.
  • the lens moving apparatus may detect displacement in the first direction of the bobbin 11000 by measuring variation in the voltage of the electromotive force generated from the third coil 26000.
  • a driving signal that is, power and current, may be applied to the first coil 12000 such that the bobbin 11000 is movable in the first direction by the electromagnetic interaction between the first coil 12000 and the magnet 13000.
  • the driving signal may be an AC signal.
  • the AC signal may be a sine wave signal or a pulse signal.
  • the AC signal may be a DC signal or a pulse width modulation (PWM) signal.
  • PWM pulse width modulation
  • first coil 12000 With the application of the driving signal, current may flow through the first coil 12000. Electromagnetic interaction occurs between the current flowing through the first coil 12000 and the magnet 13000, and the first coil 12000 is movable upward and downward in the first direction along with the bobbin 11000 owing to the resulting electromagnetic force.
  • the distance in the first direction between the first coil 12000 and the third coil 26000 varies. Owing to the variation in the distance, electromotive force, current and voltage are induced to the third coil 26000 by the inductive interaction.
  • the electromotive force, current and voltage, which are induced to the third coil 26000 may increase.
  • the electromotive force, current and voltage, which are induced to the third coil 26000 may decrease.
  • the embodiment is able to detect displacement of the first coil 12000 based on the magnitude of the voltage induced to the third coil 26000. As a result, it is possible to detect displacement in the first direction of the bobbin 11000 based on the detected displacement of the first coil 12000.
  • the lens moving apparatus is able to perform an auto-focusing function by controlling a driving signal, that is, the magnitude of current applied to the first coil 12000 and in turn controlling the position of the bobbin 11000 in the first direction.
  • the third coil 26000 may be disposed on the upper portion of the housing 14000, and may be disposed so as to be spaced apart from the second coil 23000 in the first direction.
  • the third coil 26000 and the second coil 23000 may be disposed so as to be spaced apart from each other by as great a distance as possible.
  • a driving signal may be applied to the second coil 23000.
  • the driving signal may be an AC signal.
  • the AC signal may be a sine wave signal or a pulse signal.
  • the AC signal may be, for example, a pulse width modulation (PWM) signal.
  • PWM pulse width modulation
  • FIG. 28 is a perspective view illustrating the lens moving apparatus shown in FIG. 25 , from which the bobbin 11000 is removed.
  • FIG. 29 is a perspective view illustrating the lens moving apparatus shown in FIG. 28 , from which the third coil 26000 is removed.
  • the housing 14000 may include a first seating portion 14100.
  • the first seating portion 14100 may also be formed on the upper portion of the housing 14000 so as to correspond to the position of the third coil 26000.
  • the third coils 26000 may be mounted on the first seating portion 14100 and may be secured or coupled to the surface of the housing 14000 using an adhesive or the like.
  • the adhesive may be, for example, epoxy, thermohardening adhesive or optical hardening adhesive.
  • both the first coil 12000 and the third coil 26000 may be wound in the direction parallel to the x-y plane, defined by the second and third directions, which are perpendicular to the first direction.
  • the two ends of the third coil 26000 may be conductively connected to the upper elastic member 15000, and the upper elastic member 15000 may in turn be conductively connected to the support member 22000.
  • the support member 22000 may be conductively connected to the circuit board 25000.
  • the circuit board 25000 may be conductively connected to an external device, for example, the main board (not shown) of the camera module.
  • At least four linear support members 22000 are necessary in the embodiment. Specifically, two of the support members 22000 are connected to two ends of the first coil 12000 so as to apply current to the first coil 12000, and the remaining two support members 22000 are connected to two ends of the third coil 26000 so as to allow the variation in voltage caused by the inductive interaction to be transmitted to the circuit board 25000.
  • an additional position sensor for the detection of displacement of the bobbin 11000 for example, a Hall sensor, a magnetoresistive sensor or the like, is used, unlike the embodiment, it is necessary for the position sensor to have two terminals for the application of current and two terminals for transmitting the detected signal.
  • the embodiment is able to simplify the structure of the lens moving apparatus and to reduce the manufacturing cost by detecting displacement of the bobbin 11000 using the third coil 26000, which generates an electromotive force resulting from the inductive interaction, without having to use an additional position sensor. Furthermore, in the case in which an additional position sensor is used, it is necessary to provide an additional PCB, which is required to mount the position sensor, and a structure for securing the PCB to the housing 14000 and the bobbin 11000. However, when the third coil 26000 is used, it is not necessary to provide the PCB or the structure for securing the PCB.
  • the additional position sensor may greatly restrict the linear range in output due to the positional relationship between the position sensor and the magnet 13000
  • the use of the third coil 26000 which employs inductive interaction, broadens the range of linear variation in the voltage of the third coil 26000, thereby enabling accurate detection of the position of the bobbin 11000 over a wider range.
  • FIG. 30 is a perspective view illustrating the lens moving apparatus according to the embodiment, from which the cover member 30000 is removed.
  • FIG. 31 is a plan view of FIG. 30 .
  • FIG. 32 is a cross-sectional view of FIG. 30 .
  • the third coil 26000 may be disposed on at least one of the outer side surfaces of the housing 14000.
  • the third coil 26000 may be configured to have a closed loop shape having a linear part 26100 and a curved part 26200.
  • FIG. 33 is a perspective view illustrating the lens moving apparatus shown in FIG. 30 , from which the bobbin 11000 has been removed.
  • FIG. 34 is a perspective view illustrating the lens moving apparatus shown in FIG. 33 , from which the third coil 26000 has been removed.
  • FIG. 35 is an enlarged view illustrating portion A in FIG. 34 .
  • the housing 14000 may include a second seating portion 14200.
  • the second seating portion 14200 is a portion, which is formed on the outer side surface of the housing 14000 and on which the third coil 26000 is mounted.
  • the second seating portion 14200 may include a recess 14200a and a raised support 14200b, as illustrated in FIG. 34 .
  • the recess 14200a may be formed in the outer side surface of the housing 14000.
  • the raised support 14200b may be raised from the recess 14200a.
  • the raised support 14200b is illustrated as being raised at opposite ends thereof more than at the center thereof, the disclosure is not limited thereto.
  • the raised support 14200b may be raised by the same extent at both the opposite ends and the center, or may be raised at the center thereof more than at the opposite ends thereof.
  • the inner surface of the closed loop of the third coil 26000 may be supported by the raised support, thereby seating third coil 26000 in the recess.
  • the third coil 26000 may be seated on the second seating portion 14200, and may be secured or coupled to the surface of the housing 14000.
  • the first coil 12000 and the third coil 26000 may be disposed such that the direction in which the first coil 12000 is wound and the direction in which the third coil 26000 is wound are parallel to each other.
  • the third coil 26000 may be configured such that the linear part 26100 thereof is longer than the curved part 26200, and may be wound in the longitudinal direction of the linear part 26100, as illustrated in FIG. 30 . Both the first coil 12000 and the linear part 26100 of the third coil 26000 may be wound in the direction parallel to the x-y plane defined by the second and third directions, which are perpendicular to the first direction.
  • two ends of the third coil 26000 may be conductively connected to the upper elastic member 15000.
  • the upper elastic member 15000 may be conductively connected to the support member 22000.
  • the support member 22000 may be conductively connected to the circuit board 25000.
  • the circuit board 25000 may be connected to the main board.
  • the embodiment requires at least four support members 22000, as described above.
  • the equivalent circuit of a coil is constituted by a resistance component, an inductance component and a capacitance component, and thus has an inherent electrical resonant frequency, which is referred to as a self-resonant frequency.
  • a coil causes resonance at the resonant frequency. At this time, current and voltage that flow through the coil are maximized.
  • the circuit since the circuit has the maximum current and voltage at the self-resonant frequency, it is possible to create a strong electromagnetic wave and a strong electromagnetic field. The reason for this is because the magnitude of current and voltage are proportional to the magnitude of the electromagnetic wave and electromagnetic field.
  • each of the circuit including the first coil 12000 and the circuit including the second coil 23000 may create a strong electromagnetic wave and a strong electromagnetic field, whereby the first coil 12000 and the second coil 23000 may cause increased electromagnetic interference with each other.
  • the first and second coils 12000 and 23000 are preferably designed so as to have different self-resonant frequencies.
  • the second coil 23000 and the third coil 26000 preferably have different self-resonant frequencies.
  • the self-resonant frequency of the second coil 23000 and the self-resonant frequency of the third coil 26000 are preferably designed so as to have a difference therebetween of 20 kHz or more. More preferably, the self-resonant frequency of the second coil 23000 and the self-resonant frequency of the third coil 26000 have a difference therebetween of 20 kHz to 3 MHz.
  • the second coil 23000 may be designed so as to have a self-resonant frequency of 0.5 MHz or more, and preferably a self-resonant frequency ranging from 0.5 MHz to 7 MHz.
  • the self-resonant frequency of the first coil 12000 and the self-resonant frequency of the second coil 23000 need to have a difference therebetween of 20 kHz, and preferably a difference therebetween of 20 kHz to 3 MHz.
  • the self-resonant frequency of the second coil 23000 and the self-resonant frequency of the third coil 26000 need to have a difference therebetween of 20 kHz, and preferably a difference therebetween of 20 kHz to 3 MHz.
  • the self-resonant frequency of the second coil 23000 is preferably designed so as to be higher than the self-resonant frequency of the first coil 12000. Furthermore, the self-resonant frequency of the second coil 23000 is preferably designed so as to be higher than the self-resonant frequency of the third coil 26000.
  • a blocking member (not shown) capable of blocking an electromagnetic wave or an electromagnetic field may be provided between the second coil 23000 and the image sensor.
  • the second coil 23000 may be designed so as to have a self-resonant frequency of 0.5 MHz to 7 MHz, and the blocking member may be provided.
  • the lens moving apparatus may be used in various applications, for example, as a camera module.
  • the camera module may be applied to, for example, mobile appliances such as a cellular phone.
  • the camera module may include a lens barrel, coupled to the bobbin 11000, and an image sensor (not shown).
  • the lens barrel may include at least one lens, which transmits an image to the image sensor.
  • the camera module may further include an infrared-light blocking filter (not shown).
  • the infrared-light blocking filter serves to prevent infrared light from being introduced to the image sensor.
  • a separate terminal member for electrical conduction with the circuit board 25000 may be installed on the base 21000, and a terminal may be integrally formed using, for example, a surface electrode.
  • FIG. 36 is a perspective view illustrating a portable terminal 200A according to an embodiment
  • FIG. 37 is a view illustrating the configuration of the portable terminal illustrated in FIG. 36 .
  • the body 850 illustrated in FIG. 36 has a bar shape, without being limited thereto, and may be any of various types, such as for example a slide type, a folder type, a swing type, or a swivel type, in which two or more sub-bodies are coupled so as to be movable relative to each other.
  • the body 850 may include a case (i.e. casing, housing, or cover) defining the external appearance of the terminal.
  • the body 850 may be divided into a front case 851 and a rear case 852.
  • a variety of electronic components of the terminal may be mounted in the space defined between the front case 851 and the rear case 852.
  • the wireless communication unit 710a may include one or more modules, which enable wireless communication between the terminal 200A and a wireless communication system or between the terminal 200A and the network in which the terminal 200A is located.
  • the wireless communication unit 710a may include a broadcast receiving module 711, a mobile communication module 712, a wireless Internet module 713, a near field communication module 714, and a location information module 715.
  • the A/V input unit 720 serves to input audio signals or video signals, and may include, for example, a camera 721 and a microphone 722.
  • the camera 721 may be the camera 200 including the lens moving apparatus according to the embodiment illustrated in FIGs. 11 and 23 .
  • the sensing unit 740 may sense the current state of the terminal 200A, such as for example the opening or closing of the terminal 200A, the location of the terminal 200A, the occurrence of a user's touch, the orientation of the terminal 200A, or the acceleration/deceleration of the terminal 200A, and may generate a sensing signal to control the operation of the terminal 200A.
  • the sensing unit 740 may sense whether the slide-type phone is opened or closed.
  • the sensing unit 740 serves to sense, for example, whether power is supplied from the power supply unit 790, or whether the interface unit 770 is coupled to an external appliance.
  • the input/output unit 750 serves to generate, for example, visual, audible, or tactile input or output.
  • the input/output unit 750 may generate input data to control the operation of the terminal 200A, and may display information processed in the terminal 200A.
  • the input/output unit 750 may include a keypad unit 730, a display module 751, a sound output module 752, and a touchscreen panel 753.
  • the keypad unit 730 may generate input data in response to input via a keypad.
  • the display module 751 may include a plurality of pixels, the color of which varies in response to electrical signals.
  • the display module 751 may include at least one of a liquid crystal display, a thin film transistor liquid crystal display, an organic light-emitting diode display, a flexible display and a 3D display.
  • the touchscreen panel 753 may convert variation in capacitance, caused by a user's touch on a specific touchscreen region, into electrical input signals.
  • the memory unit 760 may store programs for the processing and control of the controller 780, and may temporarily store input/output data (e.g. a phone book, messages, audio, still images, pictures, and moving images).
  • input/output data e.g. a phone book, messages, audio, still images, pictures, and moving images.
  • the memory unit 760 may store images captured by the camera 721, for example, pictures or moving images.
  • the interface unit 770 serves as a passage for connection between the terminal 200A and an external appliance.
  • the interface unit 770 may receive power or data from the external appliance, and may transmit the same to respective constituent elements inside the terminal 200A, or may transmit data inside the terminal 200A to the external appliance.
  • the interface unit 770 may include, for example, a wired/wireless headset port, an external charger port, a wired/wireless data port, a memory card port, a port for the connection of a device having an identification module, an audio input/output (I/O) port, a video I/O port, and an earphone port.
  • I/O audio input/output
  • the controller 780 may control the general operation of the terminal 200A.
  • the controller 780 may perform control and processing related to, for example, a voice call, data communication, and a video call.
  • the controller 780 may include a panel controller of a touchscreen panel drive unit, or may perform the function of the panel controller.
  • the controller 780 may include a multimedia module 781 for the playback of a multimedia file.
  • the multimedia module 781 may be provided inside the controller 780, or may be provided separately from the controller 780.
  • the controller 780 may perform pattern recognition processing, by which writing or drawing, input to a touchscreen, is perceivable as characters and images, respectively.
  • the power supply unit 790 may supply power required to operate the respective constituent elements upon receiving external power or internal power under the control of the controller 780.
  • the embodiments are able to assure linearity over a wider range, to decrease a defect rate, and to perform more accurate AF feedback control.
  • the embodiments are able to simplify the structure of the lens moving apparatus and to reduce the manufacturing cost by detecting displacement of the bobbin using the third coil, which generates an electromotive force resulting from the inductive interaction, without having to use an additional position sensor.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lens Barrels (AREA)
  • Adjustment Of Camera Lenses (AREA)
  • Studio Devices (AREA)

Claims (12)

  1. Linsenbewegungseinrichtung, umfassend:
    ein Gehäuse (14000), das einen Magneten trägt;
    einen Spulenkörper (11000), der zum Einschließen eines Objektivtubus geeignet ist, wobei der Spulenkörper (11000) eine äußere Umfangsoberfläche aufweist, auf der eine erste Spule angeordnet ist, und in dem Gehäuse (14000) angeordnet ist und sich in dem Gehäuse (14000) in einer ersten Richtung bewegt, wobei die erste Richtung entlang einer optischen Achse liegt;
    wobei der Spulenkörper (11000) auf der äußeren Umfangsoberfläche davon mit der ersten Spule (12000) vorgesehen ist, die sich innerhalb des Magneten (13000) befindet, um dem Magneten (13000) zugewandt zu sein, wobei der Magnet mittels des Gehäuses (14000) getragen wird;
    ein oberes elastisches Element (15000), das mit einem oberen Abschnitt des Spulenkörpers (11000) gekoppelt ist;
    ein unteres elastisches Element (16000), das mit einem unteren Abschnitt des Spulenkörpers (11000) verbunden ist;
    eine dritte Spule (26000), die auf einer äußeren Seitenoberfläche des Gehäuses (14000) angeordnet ist und über der ersten Spule (12000) angeordnet ist, um von der ersten Spule (12000) in der ersten Richtung entlang der optischen Achse beabstandet zu sein; und
    eine zweite Spule (23000), die angeordnet ist, um von der ersten Spule (12000) in der ersten Richtung beabstandet zu sein, und unterhalb des Gehäuses (14000) in der ersten Richtung angeordnet ist, zum Durchführen einer Handshake-Korrektur mittels Antreibens des Gehäuses in einer Richtung, die senkrecht mit der ersten Richtung ist,
    wobei der Spulenkörper (11000) konfiguriert ist, um sich in der ersten Richtung über eine elektromagnetische Wechselwirkung zwischen der ersten Spule (12000) und dem Magneten (13000) zu bewegen,
    wobei ein Abstand in der ersten Richtung zwischen der ersten Spule (12000) und der dritten Spule (26000) konfiguriert ist, um zu variieren, wenn sich die erste Spule (12000) und der Spulenkörper (11000) in der ersten Richtung bewegen,
    wobei eine Induktionsspannung basierend auf dem Abstand in der ersten Richtung zwischen der ersten Spule (12000) und der dritten Spule (26000) erzeugt wird, wenn sich die erste Spule (12000) und der Spulenkörper (11000) in der ersten Richtung bewegen, wobei das obere und das untere elastische Element (15000, 16000) mit dem Gehäuse (14000) verbunden sind.
  2. Linsenbewegungseinrichtung nach Anspruch 1, wobei die dritte Spule (26000) die Gesamtform einer geschlossenen Schleife aufweist, um einen oberen Abschnitt des Gehäuses (14000) hinsichtlich der ersten Richtung zu umgeben, wobei ein erster Aufnahmeabschnitt (14100) konfiguriert ist, um den oberen Abschnitt des Gehäuses (14000) zu umgeben, um der Form der dritten Spule (26000) hinsichtlich der ersten Richtung zu entsprechen.
  3. Linsenbewegungseinrichtung nach einem der Ansprüche 1 oder 2, wobei die dritte Spule (26000) über dem Magneten (13000) angeordnet ist und die zweite Spule (23000) unterhalb des Magneten (13000) angeordnet ist, und
    wobei die erste Spule (12000) eine achteckige Form aufweist und die dritte Spule (26000) eine polygonale Form, wenn in der ersten Richtung gesehen, aufweist.
  4. Linsenbewegungseinrichtung nach einem der Ansprüche 1 bis 3, ferner umfassend vier Trägerelemente (22000), die jeweils an vier Ecken des Gehäuses (14000) angeordnet sind, und
    wobei das obere elastische Element (15000) vier obere Segmente des elastischen Elements umfasst, die voneinander getrennt sind.
  5. Linsenbewegungseinrichtung nach einem der Ansprüche 1 bis 4, wobei die erste Spule (12000) ferner zwei Enden umfasst, die sich von der ersten Spule (12000) erstrecken, und die dritte Spule (26000) ferner zwei Enden umfasst, die sich von der dritten Spule (26000) erstrecken und
    wobei die zwei Enden der ersten Spule (12000) und die zwei Enden der dritten Spule (26000) mit dem oberen elastischen Element (15000) elektrisch verbunden sind.
  6. Linsenbewegungseinrichtung nach Anspruch 4, ferner umfassend eine Leiterplatte (25000), die unter der zweiten Spule (23000) angeordnet ist,
    wobei zwei der vier Trägerelemente (22000) durch das obere elastische Element (15000) mit zwei Enden der ersten Spule (12000) elektrisch verbunden sind und wobei die verbleibenden zwei Trägerelemente durch das obere elastische Element (15000) mit zwei Enden der dritten Spule (26000) derart elektrisch verbunden sind, dass die erste Spule (12000) und die dritte Spule (26000) mit der Leiterplatte (25000) elektrisch verbunden sind, und
    wobei sich die dritte Spule (26000) außerhalb der vier Trägerelemente (22000) befindet.
  7. Linsenbewegungseinrichtung nach Anspruch 4 oder 6, wobei ein Ende von jedem der vier Trägerelemente (22000) mit der Leiterplatte (25000) durch ein Durchgangsloch der Leiterplatte (25000) elektrisch verbunden ist und das andere Ende von jedem der vier Trägerelemente (22000) mit dem oberen elastischen Element (15000) durch ein Durchgangsloch des oberen elastischen Elements (15000) elektrisch verbunden ist.
  8. Linsenbewegungseinrichtung nach Anspruch 6, ferner umfassend eine Basis (21000) unter der Leiterplatte (25000), ein Abdeckelement (30000), das mit der Basis gekoppelt ist und zwei Hall-Sensoren (24000), die auf einer unteren Oberfläche der Leiterplatte (25000) angeordnet sind,
    wobei die zwei Hall-Sensoren (24000) in jeweils zwei Nuten (21500), die an der Basis (21000) ausgebildet sind, angeordnet sind, und
    wobei die Leiterplatte (25000) eine Vielzahl von Anschlüssen (25100) umfasst, um der ersten Spule (12000) und der zweiten Spule (23000) Strom zuzuführen.
  9. Kameramodul, umfassend:
    die Linsenbewegungseinrichtung nach einem der Ansprüche 1 bis 8, einen Objektivtubus, der mit dem Spulenkörper (11000) gekoppelt ist;
    und einen Bildsensor.
  10. Kameramodul nach Anspruch 9, wobei ein Antriebssignal an die erste Spule (12000) der Linsenbewegungseinrichtung angelegt wird, wobei das Antriebssignal ein Wechselstromsignal umfasst.
  11. Kameramodul nach Anspruch 10, wobei das Antriebssignal ferner ein Impulsbreitenmodulations(pulse width modulation - PWM)-Signal umfasst.
  12. Telefon, umfassend:
    das Kameramodul nach einem der Ansprüche 9 bis 11.
EP16164859.7A 2015-04-24 2016-04-12 Linsenbewegungsvorrichtung und kameramodul und tragbares endgerät damit Active EP3086154B1 (de)

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US20200106940A1 (en) 2020-04-02
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US10284787B2 (en) 2019-05-07
US10531012B2 (en) 2020-01-07
US20180205861A1 (en) 2018-07-19
EP3086154A1 (de) 2016-10-26
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US10904455B2 (en) 2021-01-26
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CN112887525B (zh) 2022-06-17
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US20190037117A1 (en) 2019-01-31
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